diff --git a/src/zen/folders/ZenFolders.mjs b/src/zen/folders/ZenFolders.mjs
index bf9452114..653beb6e9 100644
--- a/src/zen/folders/ZenFolders.mjs
+++ b/src/zen/folders/ZenFolders.mjs
@@ -1297,8 +1297,17 @@ class nsZenFolders extends nsZenDOMOperatedFeature {
             }
             default: {
               // Should insert after zen-empty-tab
-              const start =
+              let start =
                 parentWorkingData.node.groupStartElement.nextElementSibling;
+              start ||=
+                parentWorkingData.node.tabs[0] ||
+                parentWorkingData.node.groupStartElement;
+              if (!start) {
+                console.error(
+                  `Zen Folders: Could not find start element for parent folder with id ${stateData.parentId} while restoring session.`
+                );
+                break;
+              }
               start.after(node);
             }
           }